}
    }

    public void test_specialCharactersInMessage() {
        // Test with special characters in message
        String message = "LDAP error: \"Invalid <config>\" & 'bad chars' @ #$%^&*()";
        LdapConfigurationException exception = new LdapConfigurationException(message);

        assertEquals(message, exception.getMessage());
    }

    public void test_unicodeCharactersInMessage() {

    }

    public void test_specialCharactersInMessage() {
        // Test with special characters in message
        String specialMessage = "Error: \n\t\r Special chars: 日本語 中文 한국어 émojis 😀 🎉";
        ScheduledJobException exception = new ScheduledJobException(specialMessage);

        assertEquals(specialMessage, exception.getMessage());
    }

    assertFailsToDecode(base64(), "Wf2!", "Unrecognized character: !");
    // This sentence just isn't base64() encoded.
    assertFailsToDecode(base64(), "let's not talk of love or chains!");
    // A 4n+1 length string is never legal base64().
    assertFailsToDecode(base64(), "12345", "Invalid input length 5");
    // These have a combination of invalid length, unrecognized characters and wrong padding.

 *
 * <ul>
 *   <li>{@link Booleans}
 *   <li>{@link Bytes}
 *       <ul>
 *         <li>{@link SignedBytes}
 *         <li>{@link UnsignedBytes}
 *       </ul>
 *   <li>{@link Chars}
 *   <li>{@link Doubles}
 *   <li>{@link Floats}
 *   <li>{@link Ints}
 *       <ul>
 *         <li>{@link UnsignedInts}
 *       </ul>
 *   <li>{@link Longs}
 *       <ul>
 *         <li>{@link UnsignedLongs}

        String errorCode = "error_code:" + Long.toHexString(timestamp);

        assertTrue(errorCode.startsWith("error_code:"));
        assertTrue(errorCode.length() > 11); // "error_code:" is 11 chars
    }

    // Test with different exception types
    public void test_exceptionTypes() {
        // Test RuntimeException
        RuntimeException runtimeEx = new RuntimeException("Runtime error");

         */
        QueryBuilder execute(final QueryContext context, final Query query, final float boost, final FilterChain chain);
    }

    /**
     * Interface for filter chains that process queries through a sequence of filters.
     * This follows the Chain of Responsibility pattern for query processing.
     */
    public interface FilterChain {
        /**

      verifyHostname(hostname, it)
    }
  }

  /**
   * This is like [toLowerCase] except that it does nothing if this contains any non-ASCII
   * characters. We want to avoid lower casing special chars like U+212A (Kelvin symbol) because
   * they can return ASCII characters that match real hostnames.
   */
  private fun String.asciiToLowercase(): String =
    when {

            // Expected exception
            assertNotNull(e);
        }
    }

    // Test special characters in property values
    public void test_get_specialCharacters() {
        String testKey = "special.chars";
        String specialValue = "!@#$%^&*()_+-=[]{}|;':\",./<>?";
        System.setProperty(Constants.FESS_CONFIG_PREFIX + testKey, specialValue);

        try {
            String value = fessConfig.get(testKey);

   */
  public PercentEscaper(String safeChars, boolean plusForSpace) {
    // TODO(dbeaumont): Switch to static factory methods for creation now that class is final.
    // TODO(dbeaumont): Support escapers where alphanumeric chars are not safe.
    checkNotNull(safeChars); // eager for GWT.
    // Avoid any misunderstandings about the behavior of this escaper
    if (safeChars.matches(".*[0-9A-Za-z].*")) {
      throw new IllegalArgumentException(

    StringBuilder builder = new StringBuilder("abc");
    List<Character> chars = charactersOf(builder);
    assertEquals(asList('a', 'b', 'c'), chars);
    builder.append("def");
    assertEquals(asList('a', 'b', 'c', 'd', 'e', 'f'), chars);
    builder.deleteCharAt(5);
    assertEquals(asList('a', 'b', 'c', 'd', 'e'), chars);
  }

  public void testNewArrayListEmpty() {